Lightweight Hydrocal Lightweight Hydrocal plaster has been specially formulated for terrain model builders. It is half the weight of Hydrocal plaster, goes twice as far and is a tough, quick-setting product. Create your own castings or use it to cast rock
Specially formulated to work with Terrain and Landscape products, these tools and adhesives are designed to simplify your modeling efforts. They are fully tested for results, safety, quality and durability.